Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-04-06
Astronomy and Astrophysics
Astrophysics
11 pages, 13 figures, accepted for publication in A&A
Scientific paper
10.1051/0004-6361:20064992
Twilight studies have proved to be important tools to analyze the atmospheric structure with interesting consequences on the characterization of astronomical sites. Active discussions on this topic have been recently restarted in connection with the evaluation of Dome C, Antarctica as a potential astronomical site and several site-testing experiments, including twilight brightness measurements, are being prepared. The present work provides for the first time absolute photometric measurements of twilight sky brightness for ESO-Paranal (Chile), which are meant both as a contribution to the site monitoring and as reference values in the analysis of other sites, including Dome C. The UBVRI twilight sky brightness was estimated on more than 2000 FORS1 archival images, which include both flats and standard stars observations taken in twilight, covering a Sun zenith distance range 94-112 deg. The comparison with a low altitude site shows that Paranal V twilight sky brightness is about 30% lower, implying that some fraction of multiple scattering has to take place at an altitude of a few km above the sea level.
Patat Ferdinando
Postylyako O.
Ugolnikov O.
No associations
LandOfFree
UBVRI twilight sky brightness at ESO-Paranal does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with UBVRI twilight sky brightness at ESO-Paranal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and UBVRI twilight sky brightness at ESO-Paranal will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-721045